Abstract:
Based on the 12-lumped kinetic model established in the laboratory for residue fluid catalytic cracking (RFCC), an industrial reactor model for RFCC was established by setting unit factors and recycle calculation. An industrial simulation software of the model for unit factors calculation and product distribution prediction was developed. Based on the kinetic parameters from the laboratory model and steady operation data from an industrial unit, the unit factors were calculated by combining the fourth order RK4 (Runge-Kutta) method and the BFGS(Broyden-Fletcher-Goldforb-Shanno)optimization algorithm. It is proved that the relative errors between the calculated yields and the actual yields of the products are mostly within 5%, which indicates the reliability of the industrial reactor model established for RFCC and the unit factors. The effect of reaction temperature and mass ratio of catalyst to oil on product yields was also investigated. The prediction of product distribution trend by the software is consistent with catalytic cracking reaction rules. It is a good foundation for the further industrial application of the model.